1205534123 has 2 divisors, whose sum is σ = 1205534124. Its totient is φ = 1205534122.

The previous prime is 1205534101. The next prime is 1205534129. The reversal of 1205534123 is 3214355021.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3214355021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1205534123 - 2¹⁶ = 1205468587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1205534092 and 1205534101.

It is not a weakly prime, because it can be changed into another prime (1205534129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602767061 + 602767062.

It is an arithmetic number, because the mean of its divisors is an integer number (602767062).

Almost surely, 2^1205534123 is an apocalyptic number.

1205534123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205534123 is an equidigital number, since it uses as much as digits as its factorization.

1205534123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1205534123 is about 34720.8024532844. The cubic root of 1205534123 is about 1064.2896430423.

Adding to 1205534123 its reverse (3214355021), we get a palindrome (4419889144).

The spelling of 1205534123 in words is "one billion, two hundred five million, five hundred thirty-four thousand, one hundred twenty-three".